喇嘛甸油田特高含水期油井堵水效果

喇嘛甸油田进入特高含水开发阶段后，液油比高、耗水量大，是油气生产成本上升的主要要素，油井堵水是控制油田产水量的一项直接而有效的措施，但由于油层多年来的调整，在提高差油层动用程度的同时，油层间含水差异也越来越小，使油井堵水选井选层难度越来越大。为提高油井堵水效果，从喇嘛甸油田实际情况出发，采用盈亏平衡原理与油藏工程分析相结合的方法，研究了油井堵水的经济技术界限，提出了喇嘛甸油田特高含水开发阶段油井堵水降水量和降油量界限，通过在堵水中应用精细地质研究成果、发展新的堵水工艺以及对注采关系发生变化的堵水井调整堵水层等方法，进一步改善了油井堵水的效果。

Water plugging techniques of oil wells during extra-high water-cut stage in Lamadian oilfield

After entering the developing stage of the extra-high wa-ter cut, the high ratio of the liquid to the oil and the high consume of the water are the main factors that make the productive cost of the gas and oil raise. Water plugging of oil well is the direct and effeetive method on controlling the quantity of the produced water. But just because the adjustment of the formation in these years, when we improved the used extent of the thin and low permeable formation, the difference of the water cut among the oil formations became less and less, the difficulty of selecting the well and oil formation to water plugging of oil well became more and more. In order to improve the effect of the well plugging, based on the fact of Lamadian oilfield, using the method of combining the theory of balancing the gain and loss and the analysis of the oil reservoir en-gineering, this paper researched the economical and technological boundary of blocking the well, made a proposal about the limits of the blocking well' s quantity of deereasing water and oil in the de-veloping stage of the high water cut. Through using the results of the fine geology research, developing the new plugging skill and adjusting the plugging zones of the plugging wells that injection-pro-duction relationship have changed in the period of blocking, the water plugging effect of oil wel' is improved farther.